My friend had crap in his barrel too.
It was shooting rather inaccuratly so he waited till after his warrenty expired to open it up and it was like some wierd sticky crap on the inside of the barrel.
He used the hard plastic part of his cleaning rod and finally scrached it out. Now its pretty damn accurate.
I love KWA but they need to tighten their quality control.

I have heard reports of stickers in the barrel but no one here at KWA has ever seen one. Anyone with the problem should contact KWA customer service for an RMA so we can exchange the inner barrel and examine it for ourselves. Thank you.

My buddy just pulled out his inner barrel and found some sticky sticker like stuff in his M16 too. We both love KWA but it seems whoever is producing the inner barrels for KWA is having some trouble. lol. Any way, he is past his warranty period so we just cleaned the crap out of it.